Weather strip for sliding sashes



y 1934- R. 1.. HElD 1,957,592

WEATHER STRIP FOR SLIDING SASHES Filed Nov. 4, 1932 INVENTOR. 190000 14L 1 /5/11 ATTORNEY.

Patented May 8, 1934 UNITED STATES PATENT OFFICE WEATHER STRIP FORSLIDING SASHES Application November 4, 1932, Serial No. 641,209

7 Claims.

This invention relates to metal weather strip ping for sliding sash, theobject of the invention being to provide a strip of sheet metal formedwith spaced longitudinal ribs to close the interstice between the sashand its groove in the window frame to thereby prevent ingress of airfrom the exterior of the sash to the interior transversely of the frameand further formed to prevent seepage of air longitudinally in the 10space between the edge of the sash and channels of the weather strippingformed by the longitudinal beads or ribs.

It has been the practice heretofore to form metal weather stripping withlongitudinal ribs which are engaged by the sash edge which serve toprevent movement of air laterally around the edge of the sash and intothe room and it has been found that the sash, which rides in contactwith the ribs, provides a vertical air channel between the ribs and thesash through which air may flow into the room. Such air flow between theouter sash member of the two sliding sash and its strip passes throughthe said channels to the pulley opening and into the space in the windowframe provided for the sash weights and thence outwardly through theopening for the pulley of the lower sash. Also, with such priorstructure, while air is prevented from flowing laterally around the edgeof the lower sash, it

does to some degree enter the outer channel formed between the outer riband the sash edge and thence upwardly into the room.

By my improved construction hereinafter more fully described andclaimed, means is provided to 3 prevent a flow of air longitudinally ofthe channel formed between the ribs of the strip and the sash edge, andthe invention may be utilized in conjunction with various shapes ofmetal weather stripping, even such forms in which no longitudinal beadsare provided, except a sealing rib.

The invention is shown in conjunction with several approved forms ofweather stripping in the accompanying drawing in which--- Fig. l is across section of a sash and groove therefor provided in a window frameand showing one form of my improved weather stripping arranged toprevent movement of air longitudinally between the strip and the sash.

' Fig. 2 is a perspective view of the form of weather stripping shown inFig. 1.

Fig. 3 shows a diiierent form of weather strip- D Fig. 4 is an endelevation of another form of metal stripping with which my invention maybe utilized.

Fig. 5 is a sectional view showing the grooved face of the window frameand sash engaging therein with my improved weather stripping in 69place.

To receive the usual sash the frame is provided with a pair of groovesfor the upper and lower sash respectively one being formed between aparting strip 1 and stop 2 and the other on 1e opposite side betweenwhich the edge of the respective sash are slidable.

The type of strip shown in Fig. 1 is the form shown in the patent toJoseph P. Glaser No. 1,525,540, issued February 10, 1925, in which the(Q strip has a return-bent portion 4 providing a longitudinal sealingrib riding in a groove 5 provided in the edge of the sash and the stripis of a width to engage beneath the stop as at 6 and in a groove in theparting strip indicated at '7 and this strip is also formed with thelongitudinal beads 8 and 9. If the strip be formed with merely thelongitudinal beads as described, there is a channel 10 and 11 providedbetween the beads 8 and 9 and between the bead 8 and the edge of so thestrip, one wall of which is formed by the body of the strip and theother of which is formed by the contacting face of the sash rail and itis these channels through which air may flow vertically into the room intwo ways with the dif- 35 ferent sash. With the lower sash, air mayenter an interstice at 12 between the strip and the sash and enter thechannel 11 and thus flow into the room at the top of the lower sash.With the upper sash, which is the outside member of 9 the pair of sash,air may enter the channels at the bottom edge of the sash and flowupwardly to the pulley opening 14 and pass through the said openingthence through the pulley opening 13 for the lower sash into the room.

I To avoid such vertical flow of air, I form transverse beads 15 ofwhich there are several spaced along the strip as will be understoodfrom Fig. 5. This transverse head 15 is shown as being formed at a rightangle to the longitudinal beads 8 and 9 but may be at any angle theretothat may produce the desired result without departing from the spirit ofthis invention. The bead 15, whatever its angle may be, is of the sameheight as the ribs 8 and 9 so that the upper surfaces of 1c the beads 8and 9 and the series of transverse beads 15 are all in the same planeand are engaged by the edge of the sash. Thus free movement of airbetween the sash and the strip in the vertical channels provided by thelongitudinal beads is effectually prevented and likewise ingress of airtransversely of the stripping to the interior of the room is preventedas heretofore described by the longitudinal beads.

In the stripping shown in Figs. 1 and 2, the bead 15 terminates short ofthe edge 6 of the strip and the end thereof is practically in abuttingrelation with the stop member 2 but in the case such as is shown at theright side of Fig. 4, where the edge of the strip is not inserted in theparting strip or between the member 2 and bottom of the groove, the beadmay extend entirely to the said edge.

In Fig. 1 the longitudinal beads are shown as being formed on one sideonly of the sealing bead 4 but, as shown in Fig. 3, longitudinal ribs 17and 18 may be provided on opposite sides of the sealing rib 19 and atransverse bead 20 may be formed on one side and a similar bead 21 onthe opposite side of the member 19.

The strip may be made having a longitudinal sealing rib for entering thegroove in the edge of a sash and the portions of the strip on oppositesides of the sealing rib or only on one side as shown in Fig. 4 are notprovided with longitudinal ribs. As shown in Fig. 4, one side of thestrip is not provided with a longitudinal bead or beads but is providedwith a series of transverse beads indicated at 22 and these serve toprevent vertical movement of the air in the channel between such portionof the strip and the edge of the sash. The invention therefore is notconfined to the use of the transverse ribs with longitudinal ribs.

It will therefore be evident that whatever the form of the strip may be,the present invention consists essentially in the provision oftransverse ribs in the sheet metal strip to provide a stop for movementof air vertically in the channel or 1 channels between the sash memberand the strip and this essential feature of the invention is notconfined to the shape of the strip in cross section.

Having thus briefly described my invention, its utility and mode ofoperation, what I claim and desire to secure by Letters Patent of theUnited States isg 1. A weather strip for positioning in the bottom ofthe sash groove of a window frame in which the sash is slidable,comprising a metal strip positioned in the bottom of the runway orgroove and between members of the frame forming the side walls of thegroove, the strip having a width greater than the width of the grooveproviding edge portions engaged by the said side members of the frame,and transverse ribs formed in the body of the strip extending topractically abutting relation at the ends with the said side membersproviding a means for preventing flow of air vertically between the sashedge and strip, said strip further having a longitudinal sealing ribengaging the sash in a manner to prevent movement of air transverselybetween the sash edge and strip.

2. A weather strip for use in the sash groove of a window frame in whichthe sash is slidable comprising a sheet metal strip adapted to besecured in the bottom of the groove and provided with a longitudinalsealing rib engageable in a groove with which the sash edge is provided,the body of the strip on at least one side of the sealing rib having aseries of transversely positioned beads of the same height engaged bythe sash edge whereby flow of air vertically in the channel between thesash edge and strip is practically prevented.

3.' A weather strip for sealing the interstice between the bottom of asash groove of a window frame and a sash slidably mounted thereincomprising a sheet metal strip adapted to be secured in the bottom ofthe groove and having longitudinal ribs formed on the sash side of thestrip of a height to be engaged by the sash edge, and a series ofequi-distantly spaced transverse ribs extending across the saidlongitudinal ribs and providing a means for practically preventing flowof air longitudinally of the channels formed between the ribs and thesash edge.

4. A weather strip for use in the sash groove of a window framecomprising a metal strip in the groove shaped to provide longitudinalbeads engaging the edge of the sash and a series of spaced angularlypositioned beads of the same height as the longitudinal beads andextending transversely thereof providing means to prevent movement ofair vertically in the channels formed between the longitudinal beads andsash edge engaging the same.

5. A weather strip for positioning in the bottom of the sash groove of awindow frame in which a sash is slidable, comprising a metal striphaving a longitudinal sealing rib engaging in the sash 1' in a manner toprevent flow of air transversely through the groove, and a series ofspaced ribs of a height to occupy the space between the sash edge andbody of the strip extending transversely of the said body to practicallyprevent 1 flow of air vertically between the sash edge and strip.

6. A weather strip for positioning in the bottom of the sash groove of awindow frame in which a sash is slidable, comprising a metal stripsecured l at its opposite edges in the groove and shaped to provideraised portions on the face engaged by the sash, said portions extendingat an angle to the direction of movement of the sash and providing ameans for preventing flow of air ver- 1 tically between the sash edgeand the strip.

'7. A weather strip for positioning in the space between the bottom ofthe groove of a window frame and edge of a sash engaging thereincomrising a sheet metal strip having portions pro- 1 jecting on the sashside extending at an angle to the direction of movement of the sash andfilling the space between the body of the strip and the sash edge and,due to practical engagement of the r sash therewith, providing a meansfor preventing 1 a flow of air vertically between the sash edge and thestrip.

RUDOLPH L. HEID.

